Boiler.



L. D. LOVEKIN.

BOILER.

APPLIUATION FILED DEC. 24, 1913 Patented Dec. 1, 1914.

3 SHEETS-SEEET 1.

INVENTOR U U U U U U U WITNESSES TTORNEY L. D. LOVEKIN.

BOILER'.

APPLIGATION PILED 1330,24, 1913.

3 SHEETS-SHEET 2.

O i F Patented Dec.1,1914.

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BOILER.

APPLIGATION PILED DEG.24,1913,

1,119,026. Patented Dec.1,1914.

INVENi'oR W/TNEssEs .AZ/: l :g y

honor, but "unese separaiing devices wfwli. *o

Speoifioation of ettersatent.

To aZZ whom z't may concerfi.: i

Be is known that I,\LUTHER D. LovEKm, a Citizen of the Unit ta'tes of imerio, rosiciing inl the city sindwoounty of Philadelphia, in' the State ofPennsyivanis, have. im'entod certain new and useful Improve ments in Boiersa of Which the 'following is a true anc'i exzict description, reference 'oeing had ito tho ncoomporiying drwings, which form pari', theroof.

'My present invention rolsss to sfi'eain generotiong'boiie-rs7 and has for its objsc*| to provicie s horizontal cyiinrical boiier, such ss the Sootoh type of marine boiiora With suitsble internal provisions for (irying and superheating the steam issuing from the boiier.

In the practioai use of marine boilos of the Scot-ch 'type and other horizonal oyiindricol'boiiors, ss hsr'etoforo oonstrucsod, the

.stoam issong from the boilor frequently contains :is high as five per sent. of moisture, and With this type of boiier the issuing stam is i'egardod as voonnrnoroially dry When ii contains as ittie as 4owo and 'onohalf per sons. of nioisture. The reason foi= this high percontage of moisturs in steam ssoing from a boiior of the kind referred to is cine' to the vioient ebnllition set up in the neighborhood of the coinbustion'chamboi' and *the hostel' parts 'of the boiiog' 'mbs; Which causes bubples of stsom' to rise With such ra zili'ty ss to keep the 'Wajver sni-face continuaiiy broken.` These bui'bies of steam carry? up With them :from she broken Water surface small. particies of w'aser Which are held in mechonioai suspension in the steam. Stoam containing ss much as' two and oneshoif per centi oi" moisture shou'i not bs sed in engine cyiindors or turbinesond inoisturo present in prcoiaioly smaller percentages produces Woer hnnimcring angi other t1'o11b1es and is sfrequont souroo of considerabie damogo,

I' Hsreofor is 'nas been freqi'lentiy proposed '-to provido some sortI oI steam separator 'Within the boilci' to reduce the amount o moisture carried by the steam moving the hei in 'the form of the common (ir por- 'foratod on top, or in more oo` form ore ali open to iis 0,51, v.c-*ion shot Ly tomi to ioWert-hs 'pressure Which the ste-sin leaves thsrboilor, mici-,in pracoice ore not effoctiv in securing the delivery of dry steam. B; is possib'lc, of course, to rv and to suporhea'; the by moaos exicornal drying and-sopsrhesting ovioss. and this proci-ice is genoroliy follow-s., but

such external devices are oomborsoms and oo of heating `uoss Within izho boiior siisfi s and est-snanog bs' above the Water ievsi twoon the end. Waiis "he1'ooi1'onri pass o portlon o: the prouois, of mini?? tion:

I' through chess tubss; and I :irfan provisions so that sne steam issuing 7`o 'iio steam space of tile boiior proper Wiii,

pass snrough and aong the -spsoos beweon Wiii 'be'offeotually driod an supsrhes'ts.

`When the sro propsry arrange and, ,vs

proPortionod and sni'fisobis provisions' oro 'z w i mass Ior chrectmg the 'How of tho steam relative to the fiow of the gasss in t'io -tubes, ss heroinafter dsoribed indessii, li can. give the steam 'krom iifty to ono hunrei cegreos of supsrhoat When this is (iesiraioio.

The various novol'fc-s'suros of oonsrosi tion and arrangement Which Characterize my invontion sro pointcd out- Wi-h parfois-'(14 m-ity in the olaims annexe to smi form- 35 forms in Which my invontion may bs orr,

Of the rmvin s: .Eig'uro F is o seoionol section being tako:: on' the imo 1-1 oi' 3: Fig. is a iongit'ninal soctlon of a, por tion of the boiier shown in Fi@ 1; Fig. 3

a section taken pn'rfly on the iine 3-3 :crnci 10o pariti? on the line f* of Fig. 1*: Fig. o section. aiieii on. the line of 3: :1nd F'xg. 5 :s o sootionol sisvatlon of anosher (form oi boiier oonstrocteci in oocorrifinoe' "it-h zho `l 3.11 the crawmgs, mici ro'ferrmg first to too mosent in'vontion.

consoruction shown in 1 an 3, A 'roni reseni's 'the woli of. the oylinolricol hoilsr shell, anc B mici ilis ront'sn near enii-f ,Walls 'rospeotiveiy/ Within the) honor shell lm ter.,

ooiiex' oonssruoted and separated from the front and rear ends thereof though much nearer the latter than the former are located the usual combustion Chamber, or chambers. As shown in Figs. 1 and 3, there are three of these chambers, one central chamber E, and two side-chambcrs I E'. Those familiar with this type of boiler will understand, however, that thenumber vof combustion chambers provided depends upon the operating conditions and to the size and to some extent the preferences of the boiler. The front end wall B of the boiler shell and the front end of each of the combustion chainbers E and E'A is Connected by the-wall'ofa corresponding tubular furnacc chamber vD. The wall of each of the' furnace chambers D is in the form of a corru'gated'cylinder. Above and at the sidesof eachV of'the furnace chambers D are return flues F which extend between the front ends of the combustion chambers, and the front end wall B of the boiler. The flues F serve to' convey products of combustion Which enter the combustion chambers E and E" fromv the furnace chambers D to-the smoke box. Q, into which the flues' F discharge at the front end of the boiler.

Similarly the short tubes L take the place of stay bolts such as the stay bolts 0A beneath them which Would otherwise be required to tie the rear end walls of the combustion chamber to the rear end wall of the boiler proper. v

To insure a sutficiently prolonged contact of the steam issuing from the boiler with theA tubes P, under conditions which Will insure the drying of the steam and its super-heating,

'I have provided a novel. baffle arrangement.

This bafile arrangement consists of v two plates, S and S', Which are attached at their upper edges to the boiler shell at opposite4 sides to the bank of tubes P and converge toward one another as they' project in from Lthe boiler shell. Between the plates S and S' are plates SA and SA' 'parallel respectively to the plates S and S'. 'The four plates S, S', SA and SA' are Connected to and support a horizontal wall T; The latter thus forms the bottom wall, and the plates S and S' the side Walls of a trough-shaped The construction shown in Figs. 1 and 2` asherenbefore described in detail possesses nothing now novel with me, but on the contrary is a typical example of a marine boiler of the Scotchtype.

Each of'the combustion chambers E and E' is Connected' at its upper end to a chamber A -of tubes P which extend through the interior of the boiler between the end walls B and C near the top of the boiler shell. The casing M Which may be formed ofsheet iron lined with refractory material is preferably formed with clean out doors M' and M2. Preferably also a damper M3 is provided by which the flow of hot gases through the cas-- ing may be regulated and cut off.

O represents stay bolts connecting the end walls B and C of the boiler below the level of the tubes. P and above the level of the combustion chamber. As shown, the casing M is shaped to provide an air space N, open to the atmosphere at its ends, into whtch the rear ends of the stay bolts- O project and are thereby protected from the high temperature prevailing within the casing M It is tobe noted that the tubes P perform the purpose of and take the place ofstay bolts' similar to the bolts O which otherwise -would have to be employed to tie the upper' portions ofthe end walls B and O together..

ca singinclosing va steam .drying and superheating space, which is dlvided up into a 'central Chamber U and tvvov side chambers U' by the partitions formed by the plates 'SA and SA'.

The plates S `and S' extend the length of the boiler, but the plat'es SA and SA' do not, being spaced away from the tube sheet B, and thereby connecting theI chambers U, U' and U', as shown best in i Fig. 4. ,Steam is admitted to the chambers U' through the ports S10 formed in the walls S and S'. As shown there is a longitudinal row of these pors formed Vin each of the walls S and S' adjacent the lower edge of the latter and extending from the tube sheets C for rat-he:- more than half the length of the boiler.- As shown these ports S10 are formed by making-three sided cuts inthe plates S .and S', and then pushing each tongue Slfth'us formed outward from the plane of the plate from which it is cut, as shown in Fig. 3. The tongu'es S11 serve to prevent water which` may run up along the curved Wall of the boilershell from dashingA into the chambers U' through the ports S10.l rlhe drying and superheating effect may be regulated somcwhat by manipulating the damper M'. These ports, which form the only communicating passages between the steam drying and superheating space and the steam gcnerating portion of the boiler proper, arethus cfectually shielded against the introduction of water therethrough,

which is a matter of considerable importance, especially in the case of marine boilers. The steam passing into the chambers U' through the ports S10 travels longitu'dinally of the tubes P passing through said chambers to the end of the boiler at which the tube sheet B is located, and then passes .into the central chamber U. Transverse baffiing walls U2, U3, U4 and U5 are emflues at 'one end of the boiler to be conveyed through said tubes to the opposite end of the boiler, said means comprising a chambered casing attached to the end Wall of the boiler in register With said tube and flue ends and formed With an offset portion whereby a portion of the outer surface 'of the end Wall between the levels of said tubes and fiues is exposed, stay bolts connecting the said exposed end Wall portion' to the opposite end Wall of the boiler and provisions for causing the steam generated in said boiler to How along and across said' with ports in their outer Walls located at a tubes in passing to said steam outlet.

5. In a horizontal cylindrical boiler, the combination With the boiler shell having a steam outlet and the usual submerged heat- I ing flues and other submerged heating surfaces, of a casing'located Within the boiler shell and uniting With the latter to form a? steam drying and superheating Chamber located above the Water level in the boiler and `extending from one end of the latter to the other, partitions Within said casing dividing said space up into longitudinal chambers Which vcommunicate With one another adjacent one end of the boiler, the said steam outlet leading from one of said ehambers adjacent the opposite end of the boiler, and the said' casinaI being' formed With ports connecting the other Chamber or chambers to the interi or of the boilerI proper i at a distance from the first mentioned boiler end, tubes located within the different chambers and extcnding from one end of the boilertgthe 'other and provisions for passing hot geses through said tubes.

6: In a horizontal cylindrical boiler, the

combination With the boiler shell having a lsteam outlet and the usu'al submerged heating flues and other submerged heating surfaces, of a casing located Within the boiler shell uniting With the lattcr to form a steam drying and superheating Chamber located above the Water level in the boiler and other, partitions Within said casing diriding said space up into a central Chamber and two side chambers extending longitudinally of the boiler and in communication \vith one another at one end of the boiler1 the steam outlet opening from said central'chamber at the opposite end. of the 'boiler and said 'side chambers being formedj With ports in their outer Walls located alt a distance from ahe- 'chambefs extending longitudinally of the boiler, said central-Chamber being in communication with said steam'outlet at the one end of the boiler and in communication. With said side chambers at the opposite end of the boiler and said sidechambers being formed distance from the end of the boiler at Which the steam outlet is located, tubes passing through the different ehambers from one end of the boiler to the other, and means for causing hot gases to fioW through said tubes vfrom said one end' to said opposite end of.

the boiler.

8. In a horizontal cylindrical boiler, the

combination With the boiler shell having a steam outlet and the usual submerged heating flues and other submerged heating surfaces, of a steamtdrying and superheating space located Within the boil'er shell. and

above the Water level therein and ,comprising a central Chamber and two side chambers and formed by four plates extending longitudinally of the boiler, and secured at theiriupper edges to the top Wall of the latter, and means for closing the loWer edges of the chambers thus formed between said plates, said chambers being in communicasaid tubes. extending from one end of the letter to the I 9. In a horizontal cylindrical boiler, the combination With the boiler shellhaving a steam outlet and the usual submerged heating flues and other submerged heating surfaces, of a trough-shaped casing located within the boiler shell. and Secured at its upper edges to the latter anduniting there- With to form 'a steam drying and superheating space above the \vater level in said shell and from Which said steam outlet leads, said casinghaving a series of ports formed in each side Wall, hoods carried by said side Walls for preventing 4Water running up theA side of the boiler shell from splashing through said ports, a set of tubes cxtending from one end of the boiler to the other through said space, and provisions for passing hot gases through said tubes.

10. In a horizontal cylindricalboiler, the combination With the boiler shell having a ing flues and other submerged heating I withinflthe bo is 'cut and i .wlth .to form a steam ,mima

steam outlet and the usual'submerged heatsur. located iler s ell and secured at its upper edges to the latter and uniting there- A drying and superheat- .sgace above'the water level insaid shell faces, of `a trough-shaped casing casmg havm a seriesfl of cuts made in each side wall to'4 orm ton es each attached 'at its-upper .end-to the si e wall from which it being bent outward from the plane of the latter, thereby providing ports of tubes extending tubes extendin .from'one end of. the" forme by chaanbe 'eading fromjoneI of said chambe 1n said side Walls and hoods passage of water through from preventmg the said por-ts, a'set 'boiler to the vother t provisions' for passinghot j'gases through said tubes.

i' 11. IIn a. horizontal Jcylindricalboiler the li combinationfwith the boiler shell havm steam outle't .and the usual submerged heating flues and-'other sublnerged heating 8111'- l faces, of a' steamdrying and superheatin s ace .located Within e andcom' rising chambers arranged side 'by side an extendin longitudinally of,`the,..boi1er and I v plates Secured at their upper edges to the top wall'of the'boilr and ineans connecting the lower` edgesl Vo said Ver to the other trough each of said and provisions forpassing hot through said tubes,- said stea'mfoutlet one end of the boiler, andsaid plates being` -eut away to placevsaidehambers incornmu- 'nication with one another and for udmitting oni-Which said steam outlet leadssaidi faces, of a steam I 'one 4end of the hrough said space, and

g a ases. through vl oneend of the-boil -cut away to place e k nication with one another and for admittin A the boiler shell 'an a ove the vvater level therein through said -sai rs ladja'l'zent steamto said s' aee from 'through said ports will flow back 'and lon 'tudinally steam outletl and the ing -flues and 4other' edges o from one of sai steam to said space fromathe boiler in suc mannerthat the steam enterinI said 1 ports will flowlon .'tudinally steam outlet and in the final portion of its travel along. said tubes move ina direction tlowing through said,tubes. v v I Witnesaes: 7 I

D. $rnwslm the boiler in such manner that the steam entering'said orth top: wall of .the boiler and A said from one end'of the.

of said tubes on its .way to I B11' steam outlet.` A I I, 011111125 of` said tubes. on its way to to that in which the hot gises are by Sideex; x .o theboile'r and submergedheating v i' I drymg and superheatinrgo' i 

